Senin, 21 Oktober 2013

de javu

Deja Vu

Almost all of us have
experienced what is called deja vu : a strange feeling to say that
the new events we are feeling we 've actually experienced much
earlier . This event could be a new place being visited ,
conversations are being conducted , or a TV show that is being
watched . More strangely again , we are also often not able to
really remember when and how it occurred prior experience in detail
. All we know is the mysterious sensation that makes us not feel
strange about the new event .Strangeness of the phenomenon of deja
vu in turn gave some metaphysical theories that try to explain
causality. One is the theory that deja vu is actually derived from a
similar incident ever experienced by our souls in one previous
reincarnation of life in the past . How to explain the science of
psychology itself ?Associated with Age and Degenerative DiseasesAt
first , some scientists believe that deja vu occurs when optical
sensations received by the eye to the brain ( and perceived ) first
rather than the same sensations received by the other eye , causing
a feeling familiar to something that is actually the first time seen
. Theory known as " optical pathway delay " was broken
when in December last year found that people can experience deja vu
butapun through the sense of smell , hearing , and perabaannya .In
addition , previously Chris Moulin of the University of Leeds , UK ,
have found also sufferers of chronic déjà vu : the people who are
able to explain in detail the events that never happened . They felt
no need to watch TV because they feel have been watching the TV show
before ( but not yet ) , and they did not bother to go to the doctor
to treat ' penyakit'nya because they felt it was going to a doctor
and can tell the details during his visit ! Instead of
misperceptions or delusions , researchers began to look into causes
of deja vu in the brain and our memory .More recently , an
experiment in mice may provide new insight about the origin of the
actual deja vu . Susumu Tonegawa , an MIT neuroscientist , bred mice
lacking a number of the dentate gyrus , a small part of the
hippocampus , which is functioning normally . This section
previously known to be associated with episodic memory , the memory
of our personal experience . When encounter a situation , the
dentate gyrus will note signs of visual , audio , smell , time , and
other signs of the senses to be matched with our episodic memory .
If no match is found , this situation would be ' registered ' as a
new experience and recorded for future comparisons .According to
Tonegawa , normal mice have the same ability as humans to match the
similarities and differences between some situations . However , as
expected, the mice that the dentate gyrus is not its normal function
and then have difficulty in distinguishing the two situations are
similar but not identical . This, he added , could explain why the
experience of deja vu increases with age or the emergence of
degenerative diseases such as Alzheimer's disease : loss or damage
to the cells in the dentate gyrus due to two things make it hard to
determine if something is ' new ' or ' old ' .Creating ' Deja Vu '
in the LaboratoryOne of the things that made ​​it difficult for
researchers to unravel the mystery of deja vu is spontaneous and
natural occurrences can not be predicted . A researcher can not
simply ask participants to come and ' told ' they are experiencing
deja vu in a sterile lab conditions . Deja vu generally occur in
daily life , where it is not possible for the researcher to
constantly connect participants with brain scanners are bulky and
heavy . In addition, the rarity of deja vu going to make follow
participants anywhere at any time is not a thing to be done
efficiently and effectively . However, some researchers have managed
to simulate conditions similar to deja vu .As reported by
LiveScience , Kenneth Peller from Northwestern University found a
simple way to make someone have a ' false memories ' . The
participants were shown a picture , but they were asked to imagine a
totally different picture in their minds . Having done several times
, the participants were then asked to choose whether a particular
image they actually see or just imagined . It turns out the pictures
were only imagined participants often claimed they actually saw .
Therefore , deja vu may occur when by chance a person experienced
similar events or similar to the picture I ever imagined
.LiveScience also reported experiments Akira O'Connor and Chris
Moulin of the University of Leeds in creating the sensation of deja
vu through hypnosis . The participants were first asked to recall a
series of lists of words . Then they hypnotized so that they '
forget' those words . When the participants were shown a list of
similar words , half of them reported a similar sensation like
dejavu , while the other half are confident that they are
experiencing is really deja vu . They think this happens because the
brain areas associated with familiarity harassed her by hypnosis .